| Answer | Crossword Clue |
|---|---|
| PUREST | Least contaminated |
| TAINTED | Contaminated. |
| TAINTED | Contaminated |
| IMPURE | Contaminated |
| UNSTERILE | Contaminated |
| IMPURER | More contaminated |
| PURER | Less contaminated |
| PURE | Not contaminated |
| HEPA | Virus contracted by eating contaminated food, briefly |
